Publication Date:
2011-01-06
Description:
Apicomplexan parasites invade host cells and immediately initiate cell division. The extracellular parasite discharges transmembrane proteins onto its surface to mediate motility and invasion. These are shed by intramembrane cleavage, a process associated with invasion but otherwise poorly understood. Functional analysis of Toxoplasma rhomboid 4, a surface intramembrane protease, by conditional overexpression of a catalytically inactive form produced a profound block in replication. This was completely rescued by expression of the cleaved cytoplasmic tail of Toxoplasma or Plasmodium apical membrane antigen 1 (AMA1). These results reveal an unexpected function for AMA1 in parasite replication and suggest that invasion proteins help to promote parasite switch from an invasive to a replicative mode.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Santos, Joana M -- Ferguson, David J P -- Blackman, Michael J -- Soldati-Favre, Dominique -- MC_U117532063/Medical Research Council/United Kingdom -- U117532063/Medical Research Council/United Kingdom -- Howard Hughes Medical Institute/ -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2011 Jan 28;331(6016):473-7. doi: 10.1126/science.1199284. Epub 2010 Dec 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, Faculty of Medicine, University of Geneva, 1 rue-Michel Servet, 1211 Geneva 4, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21205639" target="_blank"〉PubMed〈/a〉
Keywords:
Antigens, Protozoan/chemistry/genetics/*metabolism
;
Cell Cycle
;
Cell Division
;
Cell Membrane/metabolism
;
Cells, Cultured
;
Fibroblasts/parasitology
;
Humans
;
Membrane Proteins/chemistry/genetics/*metabolism
;
Movement
;
Mutant Proteins/metabolism
;
Plasmodium falciparum
;
Protozoan Proteins/chemistry/genetics/*metabolism
;
Serine Proteases/genetics/metabolism
;
Signal Transduction
;
Toxoplasma/cytology/growth & development/*physiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
